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AN51 - Power Conditioning for Notebook and Palmtop Systems
AN51 - Power Conditioning for Notebook and Palmtop Systems

... switching ripple at the VC pin. A floating 5V power supply for the switcher is generated by D2 and C3 which peak detect the output voltage during switch “off” time. This is a very efficient way of powering the switcher because power drain does not increase with regulator input voltage. However, the ...
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... last longer in locomotive applications than filament lamps. They also require considerably less power than a traditional lamp, and are much cooler. A resistor is used to protect the LEDs from receiving too much power and burning out. Warning: If you wire the leads of an LED directly to your decoder ...
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... The K6 switching power supply runs at 75 KHz, allowing the filter capacitors to be much smaller, providing much less stored energy to dissipate in case of a short circuit. At the same time, the supply is capable of providing over 1 KW of continuous power and 2 KW peak to drive the most demanding aud ...
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... stage. Also referred to as a Johnson counter, this is a powerful IC which is able to count clock pulses and introduce a delay between them. The clock signal will feed into CPO of the counter, and the clock inhibit pin will simply be grounded since the 4017 circuit will remain active at all times. S ...
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HX3313651367
HX3313651367

... a circuit that has two stable states and can be used to store state information. The circuit can be made to change state by signals applied to one or more control inputs and will have one or two outputs. It is the basic storage element in sequential logic. Flip-flops and latches are a fundamental bu ...
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Switched-mode power supply



A switched-mode power supply (switching-mode power supply, switch-mode power supply, SMPS, or switcher) is an electronic power supply that incorporates a switching regulator to convert electrical power efficiently. Like other power supplies, an SMPS transfers power from a source, like mains power, to a load, such as a personal computer, while converting voltage and current characteristics. Unlike a linear power supply, the pass transistor of a switching-mode supply continually switches between low-dissipation, full-on and full-off states, and spends very little time in the high dissipation transitions, which minimizes wasted energy. Ideally, a switched-mode power supply dissipates no power. Voltage regulation is achieved by varying the ratio of on-to-off time. In contrast, a linear power supply regulates the output voltage by continually dissipating power in the pass transistor. This higher power conversion efficiency is an important advantage of a switched-mode power supply. Switched-mode power supplies may also be substantially smaller and lighter than a linear supply due to the smaller transformer size and weight.Switching regulators are used as replacements for linear regulators when higher efficiency, smaller size or lighter weight are required. They are, however, more complicated; their switching currents can cause electrical noise problems if not carefully suppressed, and simple designs may have a poor power factor.
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